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2 SheetsSheet 1.

(No Model.)

W. B. GULVER.

STEAM ENGINE.

IHHWE Hill 7 8 8 1 2 2 0 N, d e t n e t m 4 r w W I I uWulllI L W 4 A. H 3 7 0O 0 N ATTORNEY.

WITNESSES:

N. PErEns. Pholo-Ulhographen wa'min lqn. n. c

2 Sheets-Sheet 2.

(No Model.)

W. B. O ULVER.

STEAM ENGINE.

I Q v o o o -11.. m" O f A F O o 0 H z. z I I.

WITNESSES: J"

ATTORNEY.

N. PETERS. Pholo-Lflhcgrlpbor, wnhin mn. DIG.

NITE STATES PATENT OFFICE.

WILLARD B. GULVER, OF PITTSTON, PENNSYLVANIA, ASSIGNOR OF ONE- THIRD TO J. B. SOHIFFER, OF SAME PLACE.

STEAM-ENGINE.

SPF; CIPICATION forming part of Letters Patent No. 373,444, dated November 22, 1887.

Application filed October 29, 1886. Serial No. 217,510. (No model.)

To all whom it may concern.-

Be it known that I, WILLARD B. CULVER,

a citizen of the United States, residing at Pittston, in the county of Luzerne, State of Pennsylvania, have invented a new and useful Improvement in Steam-Engines, which improvement is fully set forth in the following specification and accompanying drawings, in which Figure 1 represents a partial side elevation and partial vertical section of a steamengine embodying my invention. Fig. 2 represents a section of a portion thereof. Fig. 3 represents a vertical section thereof in line as m, Fig. 1. Fig. 4 represents a vertical section of a portion in line y y, Fig. l, on an enlarged scale.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists of improvements in the class of duplex steam-engines whereby great power, effectiveness, and uniformity of action are attained, as will be hereinafter fully set forth. 2 5 Referring to the drawings, A represents two vertically-arranged cylinders supported upon the frame B, and containing the pistons G, which are formed after the manner of those in a trunk-engine.

D represents the connectingrods, which are journaled on the pistons O, and connected with the crank-shaft E of the engine.

Interposed between the cylinders A is the valve-chamber F, which contains two rotary valves, G H, the valve H encircling the valve G and having two sets of live-steam ports, a

b, and two exhaust-ports, c. The valve G has two sets oflive-steam ports, d c, it being noticed that the valves are of the form of shells,

0 the valve G being open at both ends, and the valve H closed at both ends, said valve G being the governor-valve. The valve-chamber Fhas a steam-supply pipe,J, which is formed with branches K,leading to the open ends of the valve G, for directing live steam thereinto.

The steam chests A and cylinders A are formed with live'steam portsfg and exhaustport h.

The valve H has an operating-shaft, L,

which is hollow and connected with the end of the valve by means of arms M. The valveG is secured to a shaft, N, one end of which has its bearings in the hollow shaft L and the other end in the side of the chamber F. The shaft L is rotated by means of an arm or rod, P, and the shaft N by means of an arm or rod Q, said rods being connected, respectively, with elbow or bell-crank levers R, which are mounted on counter-shafts S and connected with yokes T, which are operated by ecceu- 6o trics U on the crank-shaft E, the shafts S being properly supported. The rod Q has a slotted connection with its elbow-lever R, as

at V, whereby said connection is movablc,for adjusting the throw of said rod, and consequently of the valve G.

A governor, of any desired construction, is connected with the rod Q, and consequently with the valve, G, in the present case by means of a rod, WV, elbow -lever W, and rod W"; but it is evident that the governor may be connected with said valve in various ways, as, for example, by slotting the connection of the rod Q, with the short link N, which is directly attached to the shaft N.

In the present case the connection of said link and rod is by means of a ball-joint,whereby lateral motions may be imparted to said rod without interfering with the rising and falling motions thereof.

The operation is as follows: Steam is admitted to the valve G, the latter rotating and admitting full steam through its ports d or e to the valve H. The valve H also rotates and admits the steam through its ports a or I), simultaneously to both cylinders-that is to say, below the piston of one cylinder and above the piston of the other cylinder. The exhaust then occurs and steam is next admitted to the cylinders in reverse direction to that stated, wherebytheengineispowcrfullyand effectively operated, after the manner of a duplex engine. The extent of rotation of the valve G is con trolled by the governor. Consequently an equable supply of steam may be supplied to the 5 two cylinders and the engine thereby uniformly operated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

r0 haust-ports, c, said parts being combined and operating substantially as described.

2. A duplex steam-engine having the inner rotary valve, G, open at both ends, in combination with the shaft N, rod Q, mechanism in- :5 termediate of said rod Q, and the crank-shaft of the engine for operating the rod Q, and a governor connected to said rod Q, said parts being combined and operating substantially as and for the purpose set forth. 3. The combination of the inner valve, the shaft N, the rod Q, the countershaft S, the crank-lever R, mounted on the said countershaft and connected to the yokes T, the crankshaft E, having eccentrics U thereon, operating the said yokes T, and the crank-shaft E, and the rod W, the pivoted bell lever W, and rod WV all substantially as and for the purpose set forth.

W'. B. OULVER. Witnesses:

JOHN A. WIEDERSHEIM, A. P. GRANT. 

